Request Processing

On the Request Processing tab of the HTTP Service page, tune the following
HTTP request processing settings:

Thread Count

Initial Thread Count

Request Timeout

Buffer Length

Thread Count

The Thread
Count parameter specifies the maximum number of simultaneous requests the
server can handle. The default value is 5. When the server has reached the limit
or request threads, it defers processing new requests until the number of
active requests drops below the maximum amount. Increasing this value will
reduce HTTP response latency times.

In practice, clients frequently connect to the server and then do not
complete their requests. In these cases, the server waits a length of time
specified by the Request Timeout parameter.

Also, some sites do heavyweight transactions that take minutes to complete.
Both of these factors add to the maximum simultaneous requests that are required.
If your site is processing many requests that take many seconds, you might
need to increase the number of maximum simultaneous requests.

Adjust the thread count value based on your load and the length of time
for an average request. In general, increase this number if you have idle
CPU time and requests that are pending; decrease it if the CPU becomes overloaded.
If you have many HTTP 1.0 clients (or HTTP 1.1 clients that disconnect frequently),
adjust the timeout value to reduce the time a connection is kept open.

Initial Thread Count

The Initial Thread Count property specifies the minimum
number of threads the server initiates upon start-up. The default value is 2. Initial Thread Count
represents a hard limit for the maximum number of active threads that can
run simultaneously, which can become a bottleneck for performance.

Request Timeout

The Request Timeout property specifies the number of seconds the server
waits between accepting a connection to a client and receiving information
from it. The default setting is 30 seconds. Under most circumstances, changing
this setting is unnecessary. By setting it to less than the default 30 seconds,
it is possible to free up threads sooner. However, disconnecting users with
slower connections also helps.

Buffer Length

The size (in bytes) of the buffer used by each of the request processing
threads for reading the request data from the client.

Adjust the value based on the actual request size and observe the impact
on performance. In most cases the default should suffice. If the request size
is large, increase this parameter.